Different scholarships and bursaries are available for different postgraduate courses and universities - there aren't any specific funds set aside centrally. The best thing to do would be to visit the websites of departments/universities that you are interested in and see what funding is available from them - click on links to 'finance' or 'bursaries' or the 'student office'. Alternatively contact your chosen places and ask them, and they will be able to provide you with advice on what funding might be available to you. You may also be able to access graduate career development loans, which are at a preferential interest rate and don't require you to start paying back until the course is over.